Skill Switch
Metagame Premise: Pokemon can use the moveset of any Pokemon they share an ability with.
Movepool inheritance ideas have been submitted here before, but I think this is an interesting take on it. I looked through this thread and I don't believe this has been proposed before, but I might be wrong.
This opens up exciting possibilities for a lot of Pokemon, especially ones with common abilities.
Potential bans and threats:

gets Bolt Beak. Enough said. Luckily, Fisheous Rend inheritors are typically slow and/or lack STAB or high Attack.

might still be terrifying with Strong Jaw and a Scarf.

and

get Brave Bird from

if you can inherit from natdex Pokemon, and Dual Wingbeat from

otherwise.
If you can inherit from natdex, restrict taking from

, for obvious reasons.
Pressure users can take exclusive moves from the multitude of Pressure legendaries.

gets Aeroblast,

can spread burns with Sacred Fire, and a few others get valuable coverage.

gets Court Change and Pyro Ball.

gets trapping shenanigans with Spirit Shackle.
Water Shuriken!

and

seem like the best users. If you can inherit from natdex, Water starters like

and

also get it. Shell Smash Water Shuriken Blastoise is scary.

all get their terrain interaction moves, along with Play Rough for Koko and Bulu. These might be restricts.
Ultra Beasts are fun:

gets Agility, which might help patch up its disappointing Speed. It also gets a multitude of much-needed coverage moves. idk if this will be viable.

gets Iron Head, Power Whip, and U-Turn. Ouch.

gets Volt Switch and Synthesis.

and

also get Volt Switch.

The Rotoms expand on their already huge support movepool, getting tools like Rapid Spin, Stealth Rock, and Recover.

can actually utilize Double Iron Bash's insane flinch chance. This is probably a restrict.

and

get No Retreat. Seems interesting.

gets Techno Blast, the next best thing to Boomburst. It could also hold a drive for a customized coverage move. Still probably unviable, but it seems interesting.

gets Mew's whole movepool, which is fun.

,

, and other Regenerator users get Spore and Leech Seed to wreak even more havoc.

gets Shift Gear, Meteor Mash, and Megahorn. My bias aside, this seems really fun. It also gets Spectral Thief, but lacks the speed to fully utilize it.
Questions for the community:
Should you be allowed to inherit from natdex?
I've assumed you can mix and match inherited moves, but would it be more interesting if you can only inherit from one Pokemon at a time?
On a related note, should you also have to use the same ability as the Pokemon you're inheriting from? i.e. Blaziken would have to use Blaze to get Pyro Ball.
This is my first submission, so any feedback would be welcome.
Edit: I would also like feedback on the name.